如何在WPF中隐藏窗口默认上下文菜单

Question

我开发了一个具有全屏功能的WPF应用程序。但是当我的窗口处于全屏模式时，只要我右键单击Datagrid（同时拥有Datagrid）自定义，Window State Full Screen中的自定义上下文菜单就无法正常工作上下文在几分之一秒内消失，默认上下文菜单如下所示，显示在Datagrid上。

____________
| Restore  |
|          |
| Move     |
|          |
| Size     |
|          | 
| Minimize |
|          |
| Maximize |
|          |
| Close    |
|__________|

所以，我希望在我的窗口处于全屏模式时隐藏此菜单。 context menu适用于Maximize和Normal窗口状态。

代码段：

<Menu DockPanel.Dock="Top"  Height="30" HorizontalAlignment="Stretch">

            <MenuItem Header="_View">
               <MenuItem IsCheckable="True" IsChecked="False" Header="Full Screen" Checked="FullScreen_Checked" Unchecked="FullScreen_Unchecked"></MenuItem>
            </MenuItem>
            <MenuItem Header="_Help">
                <MenuItem Header="View Help">
                    <MenuItem.Icon>
                        <Image Height="16" Width="16" Source="Resources/question-icon.png"></Image>
                    </MenuItem.Icon>
                </MenuItem>
                <Separator></Separator>
                <MenuItem Header="About" Click="About_Click">
                    <MenuItem.Icon>
                        <Image Height="16" Width="16" Source="Resources/info6.png"></Image>
                    </MenuItem.Icon>
                </MenuItem>
            </MenuItem>
        </Menu>
<DataGrid Padding="3" BorderBrush="SkyBlue" BorderThickness="1"  ItemsSource="{Binding Source={StaticResource cvsCoreData}}"   SelectionUnit="FullRow" IsReadOnly="True" Style="{StaticResource AzureDataGrid}" AutoGenerateColumns="False" x:Name="Data"  Margin="0,5,0,28">

<DataGrid.ContextMenu>
                <ContextMenu>
                    <MenuItem x:Name="ContextKeyTerm" IsEnabled="False" IsCheckable="True" IsChecked="True" Header="Key Term" Unchecked="ContextMenu_Unchecked" Checked="ContextMenu_Checked" Tag="0" />
                    <MenuItem x:Name="ContextKeyTermDescription" IsCheckable="True" IsChecked="True" Header="Key Term Description" Unchecked="ContextMenu_Unchecked" Checked="ContextMenu_Checked" Tag="1"  />
                    <MenuItem x:Name="ContextShortHand" IsCheckable="True" IsChecked="True" Header="Short Hand" Unchecked="ContextMenu_Unchecked" Checked="ContextMenu_Checked" Tag="2"  />
                    <MenuItem x:Name="ContextRule" IsCheckable="True" IsChecked="True" Header="Rule" Unchecked="ContextMenu_Unchecked" Checked="ContextMenu_Checked" Tag="3"  />
                    <MenuItem x:Name="ContextPartM" IsCheckable="True"   Header="Part" Unchecked="ContextMenu_Unchecked" Checked="ContextMenu_Checked"  Tag="4"  />
                    <MenuItem x:Name="ContextSectionM" IsCheckable="True"   Header="Section" Unchecked="ContextMenu_Unchecked" Checked="ContextMenu_Checked" Tag="5"  />
                </ContextMenu>
            </DataGrid.ContextMenu>
        </DataGrid>



private void FullScreen_Checked(object sender, RoutedEventArgs e)
        {
            this.WindowState = WindowState.Normal;
            this.IgnoreTaskbarOnMaximize = true;
            this.WindowState = WindowState.Maximized;
            this.ShowTitleBar = false;
        }

        private void FullScreen_Unchecked(object sender, RoutedEventArgs e)
        {
            this.WindowState = WindowState.Normal;
            this.IgnoreTaskbarOnMaximize = false;
            this.WindowState = WindowState.Maximized;
            this.ShowTitleBar = true;
        }